We have =
Cakn application which use mod_WSGi module for calling python web interpret=
er same s is working fine on apache 2.4.18 on Ubuntu 16.04 , now int=
ernal security team has notified us to upgrade Apache with 2.4.39.

when i did "apt-cache policy Apache"=C2=
=A0 its shows installed & candidate version same i.e 2.4.18, so =
i added repo=C2=A0add-apt-repository ppa:ondrej/apache2 and upgraded=
to 2.4.39 .

after upgrading same site stops working and=C2=A0 sh=
ows below errors in error.log and application specific logs.